1 files changed, 45 insertions, 0 deletions
diff --git a/referee.h b/referee.h
new file mode 100644
index 0000000..5f278c5
--- /dev/null
+++ b/referee.h
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+#pragma once
+
+#include <vector>
+#include <string>
+#include <string_view>
+#include <optional>
+#include "process.h"
+
+using namespace std;
+
+
+class Referee {
+	Process proc;
+	bool isEnd = false;
+	vector<int> scores;
+
+	void readScores();
+
+public:
+	Referee(const string_view execname, const vector<string> &players);
+	~Referee();
+
+	// player: 0 = first player, 1 = second player
+	bool moveValid(int player, const string_view line);
+
+	bool gameEnded();
+	optional<vector<int>> getScores();
+};
+
+/*
+Referee protocol:
+
+At startup, the referee receives a line containing the number of players in the
+game, followed by that number of lines containing the players' names.
+
+Then, it repeatedly receives a line on stdin of the form '<player> <line>',
+where <player> is the index of the player in the game (0 is first, 1 is second,
+etc.) and <line> is the line as written out by the player. The referee should
+then write a line to stdout that is equal to either 'valid', 'invalid', or
+'valid end'. 'valid' and 'invalid' indicate a valid and invalid move, while
+'valid end' indicates a valid move that ends the game. After writing the line
+'valid end', the referee should write a line containing as many integers
+(separated by spaces) as there are players, giving their scores at the end of
+the game.
+*/